The Tasmanian tiger was doomed long before humans began hunting the enigmatic marsupial, scientists said Tuesday, with DNA sequencing showing it was in poor genetic health for thousands of years before its extinction.
Oxygen has provided a breath of fresh air to the study of the Earth's evolution some 400-plus million years ago.
Researchers at Queen's University Belfast have found that female cats are much more likely to use their right paw than males.
When people are awake, their pupils regularly change in size. Those changes are meaningful, reflecting shifting attention or vigilance, for example. Now, researchers reporting in Current Biology on January 18 have found in ...